JPS5749128B2 - - Google Patents

Info

Publication number
JPS5749128B2
JPS5749128B2 JP50082076A JP8207675A JPS5749128B2 JP S5749128 B2 JPS5749128 B2 JP S5749128B2 JP 50082076 A JP50082076 A JP 50082076A JP 8207675 A JP8207675 A JP 8207675A JP S5749128 B2 JPS5749128 B2 JP S5749128B2
Authority
JP
Japan
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
JP50082076A
Other languages
Japanese (ja)
Other versions
JPS525497A (en
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP50082076A priority Critical patent/JPS525497A/ja
Priority to US05/702,172 priority patent/US4066565A/en
Priority to DE19762629931 priority patent/DE2629931A1/de
Publication of JPS525497A publication Critical patent/JPS525497A/ja
Publication of JPS5749128B2 publication Critical patent/JPS5749128B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G11B5/706—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material
    • G11B5/70626—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances
    • G11B5/70642—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances iron oxides
    • G11B5/70652—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances iron oxides gamma - Fe2 O3
    • G11B5/70668—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances iron oxides gamma - Fe2 O3 containing a dopant
    • G11B5/70673—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances iron oxides gamma - Fe2 O3 containing a dopant containing Co
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G49/00—Compounds of iron
    • C01G49/02—Oxides; Hydroxides
    • C01G49/06—Ferric oxide [Fe2O3]
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G11B5/706—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material
    • G11B5/70626—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances
    • G11B5/70642—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances iron oxides
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/42—Magnetic properties

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Hard Magnetic Materials (AREA)
  • Paints Or Removers (AREA)
  • Magnetic Record Carriers (AREA)
  • Compounds Of Iron (AREA)
JP50082076A 1975-07-02 1975-07-02 Ferromagnetic grit manufacturing process Granted JPS525497A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP50082076A JPS525497A (en) 1975-07-02 1975-07-02 Ferromagnetic grit manufacturing process
US05/702,172 US4066565A (en) 1975-07-02 1976-07-02 Process for producing cobalt- and iron-containing ferromagnetic powder
DE19762629931 DE2629931A1 (de) 1975-07-02 1976-07-02 Verfahren zur herstellung eines kobalt- und eisenhaltigen ferromagnetischen pulvers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50082076A JPS525497A (en) 1975-07-02 1975-07-02 Ferromagnetic grit manufacturing process

Publications (2)

Publication Number Publication Date
JPS525497A JPS525497A (en) 1977-01-17
JPS5749128B2 true JPS5749128B2 (de) 1982-10-20

Family

ID=13764368

Family Applications (1)

Application Number Title Priority Date Filing Date
JP50082076A Granted JPS525497A (en) 1975-07-02 1975-07-02 Ferromagnetic grit manufacturing process

Country Status (3)

Country Link
US (1) US4066565A (de)
JP (1) JPS525497A (de)
DE (1) DE2629931A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0140892Y2 (de) * 1983-02-28 1989-12-05

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2705967C2 (de) * 1977-02-12 1990-01-04 Basf Ag, 6700 Ludwigshafen Verfahren zur Herstellung von nadelförmigem kobalthaltigem magnetischem Eisenoxid
FR2382325A1 (fr) * 1977-03-02 1978-09-29 Kodak Pathe Produit comprenant une couche d'enregistrement magnetique transparente
JPS6044254B2 (ja) * 1977-03-16 1985-10-02 富士写真フイルム株式会社 強磁性粉末の製造方法
GB1603213A (en) * 1977-04-20 1981-11-18 Hitachi Maxell Cobalt containing iron oxide magnetic particles and method for the preparation of the same
DE2815712A1 (de) * 1978-04-12 1979-10-25 Bayer Ag Eisenoxide zur magnetischen signalaufzeichnung und verfahren zu deren herstellung
US4364988A (en) * 1978-07-31 1982-12-21 Hitachi Maxell, Ltd. Magnetic recording medium
US4226909A (en) * 1978-08-21 1980-10-07 Minnesota Mining And Manufacturing Company Cobalt-doped acicular hyper-magnetite particles
DE2903593C3 (de) * 1979-01-31 1982-05-06 Bayer Ag, 5090 Leverkusen Kobalt-dotierte ferrimagnetische Eisenoxide und Verfahren zu deren Herstellung
DE3248533A1 (de) * 1981-12-29 1983-07-14 Daikin Kogyo Co., Ltd., Osaka Kobalt-modifizierte eisenoxid-teilchen und verfahren zu ihrer herstellung
US4657816A (en) * 1982-04-19 1987-04-14 Memorex Corporation Ferromagnetic recording materials
JPS5918120A (ja) * 1982-07-16 1984-01-30 Ishihara Sangyo Kaisha Ltd コバルト及び第一鉄含有強磁性酸化鉄の製造方法
EP0377933B1 (de) * 1988-12-29 1995-07-19 Toda Kogyo Corp. Magnetische Eisenoxydteilchen und Verfahren zu ihrer Herstellung
JPH02263407A (ja) * 1989-04-04 1990-10-26 Showa Denko Kk 磁気記録用磁性酸化鉄粉の連続製造法と装置
US5188898A (en) * 1989-08-09 1993-02-23 Mitsui Toatsu Chemicals, Incorporated Ferromagnetic metal particles and preparation process thereof
DE4205634A1 (de) * 1992-02-25 1993-08-26 Bayer Ag Niederkoerzitive eisenoxidpigmente sowie verfahren zu deren herstellung
DE4319572A1 (de) * 1993-06-14 1994-12-15 Toda Kogyo Corp Co-haltige Eisenoxidpigmente, Verfahren zu ihrer Herstellung und diese enthaltende magnetische Medien
KR101933480B1 (ko) * 2016-03-25 2018-12-31 주식회사 엘지화학 산화적 탈수소화 반응용 촉매 및 제조방법

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3075919A (en) * 1959-08-21 1963-01-29 Basf Ag Process for the production of acicular gamma-iron (iii) oxide
CA988704A (en) * 1971-07-19 1976-05-11 Akira Okazoe Ferro-magnetic acicular particles for recording medium
JPS5321119B2 (de) * 1973-03-20 1978-06-30

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0140892Y2 (de) * 1983-02-28 1989-12-05

Also Published As

Publication number Publication date
DE2629931A1 (de) 1977-01-27
US4066565A (en) 1978-01-03
JPS525497A (en) 1977-01-17

Similar Documents

Publication Publication Date Title
AU1385876A (de)
FR2310316B3 (de)
JPS51108666A (de)
FR2336332B1 (de)
JPS5726473Y2 (de)
JPS5754512B2 (de)
JPS521777U (de)
JPS5250589U (de)
JPS5510958Y2 (de)
JPS51162623U (de)
JPS51105743U (de)
JPS5257026U (de)
JPS5212485U (de)
JPS51108314U (de)
BG21127A1 (de)
CH587378B5 (de)
CH587100A5 (de)
CH587689A5 (de)
CH588273A5 (de)
BE839841A (de)
CH593475A5 (de)
CH586771A5 (de)
CH587146A5 (de)
CH597734A5 (de)
CH594452A5 (de)